DL-Asparaginium nitrate

Abstract

In the title compound, C4H9N2O3 +·NO3 −, alternatively called (1RS)-2-carbamoyl-1-carboxy­ethanaminium nitrate, the asymmetric unit comprises one asparaginium cation and one nitrate anion. The strongest cation–cation O—H⋯O hydrogen bond in the structure, together with other strong cation–cation N—H⋯O hydrogen bonds, generates a succession of infinite chains of R 2 2(8) rings along the b axis. Additional cation–cation C—H⋯O hydrogen bonds link these chains into two-dimensional layers formed by alternating R 4 4(24) and R 4 2(12) rings. Connections between these layers are provided by the strong cation–anion N—H⋯O hydrogen bonds, as well as by one weak C—H⋯O inter­action, thus forming a three-dimensional network. Some of the cation–anion N—H⋯O hydrogen bonds are bifurcated of the type D—H⋯(A 1,A 2).

Crystal structures of three halide salts of L-asparagine: an isostructural series

“…The structures of two simple salts of racemic asparagine have also been reported. These are the nitrate and the perchlorate forms (Moussa Slimane et al, 2009;Guenifa et al, 2009). All these literature forms are anhydrous, but despite this difference and further differences in anion type and cation geometry, all form the same R(8) 2 2 -based, one-dimensional hydrogen-bonded chain motif seen in the halide salts (I), (II) and (III).…”

L-Leucinium fluoride monohydrate

“…For background to carboxylic acids, see : Miller & Orgel (1974); Kvenvolden et al (1971). For our research on organic salts of amino acids, see: Guenifa et al (2009);Moussa Slimane et al (2009). For l-leucinium oxalate, see: Rajagopal et al (2003) and for l-leucinium perchlorate, see : Janczak & Perpé tuo (2007 H atoms treated by a mixture of independent and constrained refinement Á max = 0.28 e Å À3 Á min = À0.14 e Å À3 Table 1 Hydrogen-bond geometry (Å , ).…”

“…Simple carboxylic acids, which are believed to have existed in the prebiotic earth (Miller & Orgel, 1974;Kvenvolden et al, 1971), form crystalline complexes with amino acids. The present paper is a part of our research with organic salts of amino acids (Guenifa et al, 2009;Moussa Slimane et al, 2009).…”

Adeninium 3-carboxyanilinium bis(perchlorate) trihydrate

“…The supramolecular networks become especially interesting when the cation and anion can participate in hydrogen-bonding. In this regard previous studies have been concerned with organic salts of carboxylic acids (Bendjeddou et al, 2003;2009;Cherouana et al, 2003;Moussa Slimane et al, 2009) Our investigations have focused on the use of perchloric, amino acids and/or nitrogen base acid as a structural building in the synthesis of hydrogen-bonded patterns inorganic-organic high-dimensional structure.…”